US Bridges

400th Avenue over James River

Fair

Brown County, South Dakota · 1E & 1.4S of Tacoma Park · Structure no. 000000007240285

Built
1978
47 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
132 ft
2 main spans
Daily traffic
54
2022 count
Owner
County
County Highway Agency

About this bridge

400th Avenue over James River is a prestressed concrete tee beam carrying 400th Avenue over James River in Brown County, South Dakota. It was built in 1978, so it is 47 years old, younger than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 54 vehicles a day, roughly 3% of them trucks, projected to reach 54 by 2032. The structure is 132 ft (40.2 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries400th Avenue
CrossesJames River
Location1E & 1.4S of Tacoma Park
RouteCounty Highway 6467
CountyBrown County
StateSouth Dakota
Coordinates45.52455, -98.22667
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length132 ft (40.2 m)
Longest span65 ft (19.8 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2022)
Projected traffic54 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 400th Avenue over James River built?

It was built in 1978, making it 47 years old in 2025.

What condition is 400th Avenue over James River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does 400th Avenue over James River carry?

About 54 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 400th Avenue over James River?

The structure is 132 ft (40.2 m) long with a longest span of 65 ft (19.8 m) and a deck 32 ft wide.

Who owns 400th Avenue over James River?

It is owned by the County Highway Agency.